Breathtaking footage shows astronauts diving headfirst into space hundreds of miles above the earth.
The stunning clip was posted on Twitter by astronaut Randy Bresnik, who wrote: "Diving head-first into the vastness of space. How spectacular is that view?"
The GoPro video shows Bresnik and engineer Joe Acaba stepping out of the International Space Station as they look down on the planet below.
The duo carried out a spacewalk lasting more than six hours, during which time they installed new cameras and carried out maintenance work on robotic arms.